Last updated: June 2, 2025
In Longcheng, China, being aware of the UV Index is crucial for safeguarding your skin health and preventing sunburn. Understanding UV levels helps residents and visitors alike make informed decisions about sun protection, especially during the peak hours of exposure. With a humid subtropical climate (Cfa), Longcheng experiences significant UV radiation, particularly between 10 AM and 2 PM when the index can soar to 12, indicating a very high risk of harm from unprotected sun exposure. By staying informed about the UV Index, you can enjoy the sun safely while protecting your skin from its potentially damaging effects.
As the sun rises, the UV Index starts off at a mild 1 at 7:00 AM, gradually climbing to a moderate 2 by 8:00 AM. However, things heat up as the day progresses; by 10:00 AM, it peaks at an impressive 8. The highest solar intensity strikes from 11:00 AM to 1:00 PM, with a staggering maximum of 12 during the noon hour. As the afternoon rolls in, the UV Index begins to taper off, dropping to 8 by 3 PM, and further declining to a gentle 1 by 7:00 PM. It’s clear that the midday sun is the most potent—remember to protect your skin during those hours!
| Time | UVI | Category | Time to Burn |
|---|---|---|---|
| 07:00 | 1 | low | 45 min |
| 08:00 | 2 | low | 45 min |
| 09:00 | 5 | moderate | 30 min |
| 10:00 | 8 | very high | 15 min |
| 11:00 | 11 | extreme | 10 min |
| 12:00 | 12 | extreme | 10 min |
| 13:00 | 12 | extreme | 10 min |
| 14:00 | 11 | extreme | 10 min |
| 15:00 | 8 | very high | 15 min |
| 16:00 | 5 | moderate | 30 min |
| 17:00 | 3 | moderate | 30 min |
| 18:00 | 1 | low | 45 min |
| 19:00 | 1 | low | 45 min |
Throughout the year, UV exposure varies significantly, with the highest levels typically occurring from March to September. During these months, the UV Index reaches extreme levels of 11 to 13, resulting in a burn time as short as 10 minutes. February marks the transition into this high-risk period, where the UV Index escalates to 8 (very high), requiring increased caution. Conversely, the higher risk months are March, April, May, June, July, August, and September. Visitors and residents are advised to take precautions during these times, such as wearing protective clothing, applying sunscreen, and seeking shade, especially during midday hours. In contrast, October and November see a slight decrease in UV levels, though caution is still recommended due to very high UV indexes of 8 to 10. By December and January, UV exposure lessens to high levels, allowing for more extended safe exposure times of 25 minutes.
UV Risk Categories
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Beijing UVI | 2 | 3 | 5 | 8 | 9 | 9 | 10 | 9 | 7 | 6 | 4 | 2 |
| Chengdu UVI | 5 | 6 | 8 | 10 | 12 | 11 | 11 | 10 | 11 | 8 | 6 | 4 |
| Shanghai UVI | 5 | 6 | 8 | 10 | 10 | 11 | 12 | 11 | 11 | 8 | 6 | 4 |
| Longcheng | 7 | 8 | 11 | 11 | 13 | 12 | 13 | 13 | 11 | 10 | 8 | 6 |
| Guangzhou UVI | 7 | 9 | 11 | 12 | 13 | 13 | 13 | 12 | 11 | 10 | 9 | 7 |
| Shenzhen UVI | 7 | 10 | 12 | 12 | 14 | 13 | 13 | 13 | 12 | 11 | 9 | 7 |